Respuesta :
					                   "An Indicator" changes color when it comes in contact with an acid or a base
An indicator could be anything like:
1) Litmus paper
2) Bromothymol blue
3) Phenolphthalein
Hope this helps!
					                
					             An indicator could be anything like:
1) Litmus paper
2) Bromothymol blue
3) Phenolphthalein
Hope this helps!
 
			                  